Sound-box for talking-machines.



. Smm.

' SOUND BOX FOR TALMNG MACHlNES.

APPLICATIDN FILED AUG.24. 1917.

lUNITED STATES PATENT oir-rios.

JAMES F. SMITH, OF ST. LOUIS, MISSOURI, ASSIGNOR 0F ONE-THIRD T0 ANTHONY F. ITTNER AND ONE-THIRD TO' ARTHUR H. BRADLEY, BOTH '0F ST. LOUIS, MTSSOURI.

SOUND-BOX FOR TALKING-MACHINES.

Specification of Letters Patent.

Patented Apr. 29,1919.

Application filed August 24, 1917. Serial No. 187,922.

cerns the stylus, lever construction and its adjustable mount.

The objects of the invention are the elimination of incidental noises and the improvement of the tone qualitiese and volume ofA sound produced. Further ,objectsy are to provide for the adjustment of the pitch and the loudness of the tone` and to arrange for the proper mount-ing of the sound box with relationv to the record for satisfactor)7 operation with all kinds of records.

The invention consists iny a. stylus lever ,and a spring mounting therefor. permitting adjustment for sensitiveness and amplitude l of the vibratioi'is of the stylus. The invention also consists in the details of the connection. between the sound box and tone arm as hereinafter described.

Further objects and details of the invention appear in connection with the description of the embodiments ot' the invention shown in the accompanying drawings; and what the invent-ion'consists'in is more particularl)v defined inthe appended claims.

In the. drawings, wherein the same rei" erence characters designate the same parts in the several views,

Figure 1 is a face view of a sound box and tone arm" connection embodying one form ot the invention;

Fig. 2 is a side view of the samer,

Fig. Sis a cro section on the line in Fig. 2, loohl inthe direction indicated; Y

Fig. 4 is a plai view of 'the sound box Shown in Fig. 1i, the ton'e arm being shown in cent-ral horizontal cross-section:

Fig. 5 is a back view ofthe sound box, showing a portion ot' the tone arm;

Fig. 6 is an enlarged. vertical sectional view of the pivoted portion ot the stylus lever;

Fig. 7 is a bot-tom plan view of the spring support for the stylus lever; and

Fig. 8 is a face view of a modified form ot' st vlus lever, the device being shown in position to play records having lateral 11ndulations.

Referring to the drawings, particularly Figs. 1 to 7, inclusive, the tone arm 10 carries at its outer extremity a sound box 11, which is provided with a diaphragm 12. The sound box is connected to the tone arm b vmeans of an elbow 13, one branch of which is secured in the end of the tone arm the two notches in the adjacent edge of the elbow 13, therebY positioning the lug in the correct position for playing hill and dale or laterally cutrecords. The withdrawal of the screw 1G permits removal of the sound box. The hollow stem has an opening l-la in its side near its inner end to provide c mimunication between the' sound box and the tone horn in all positions of adjustment.

The lever arm lS shown in Figs. 1 t0 7, inclusive. is tapered upwardl)v and terminates in a horizontal coil 19. The end of the coil is soldered or otherwise secured to the outer side of the ,diaphragm 1Q at its middle. between the diaphragm and the upper end of the lever 1S. 'lhe lower portion of the lever is provided with a `socket 20 for the st vlus` 21. The stem of `the stvlus may be secured in the socketbv a knurled screw Q2 or an)r suitable means. The st'vlus shown in the drawings hasl an agate point 23. but any suitable point inaybe' used such as a ste-cl needle for playing .all laterally' cut records. or a ball or round point /for playing hill and dale cut records.

Thisl forms,l a iexible connection,

T he free end of thelverarm is pivotally l porting member 25'is adjustably 'secured to oise forms ami arrangements of the the rear face of the sound box and has rearwardly and forwardly extending flanges 26 and 2T at itsA base portion'.A The rear end portion of the .spring 24 is adjustably secured to 'the rearwardl)T extending flange 26 of the supporting member 25, and is blocks 28, arranged one between the flange 26 and the top surfaces of the spring 24- and the other below said spring. The spring 24 is adjustable toward and away from the lever arm 18 by means of screws 29 which pass through slots 30 in the spring 24- and screw into the flange 2G of the supporting member. The screws 29 also pass through the insulating blocks 28 and hold them in position. The forwarlly extending arm 27 of the supporting member 25 carries a clamp El which embraces the spring 24. This clamp 31, is slidable on the flange 27 of the ysupporting member and spring for adjusting the amplitude of the vibrations insulated therefrom by sound insulating of the lever arm 18. The clamp is insulatedv from the spring 2 4 by suitable sound insulating blocks 32.

A block 33 is secured t-o the forward end portion of the spring 24. The lever arm 1S passes through alined openings in the block 33 and the spring 24. The lever arm is pivotallv mounted in the block 33 by oppositelv disposed pivot screws 34. These screws are threaded in the block and project into a sound insulating plug 35 which is mounted in a bore in each ofthe trunnions 36 on each side of thelever arm 18. The construction shownin Fig. 8 shows a modied form of connection between the upper end of the leverarm 18 and the diaphragm 12. 2 The tapering upper end of the. lever arm is wound i-n the shape of a .spiral coil 36, the end of which is soldered or otherwise secured to the diaplragn'i at its middle.

` The sound box construction described in the foregoing specification is capable of playing all makes of records. For playing laterally cut records the sound 4box is set at a. slight angle, and a stylus -or needle point used in connection with that particu* lar record is inserted in the lever arm.l For playing hill and dale 'cutrecords, the sound box is set so as to bring the stylus at rightangles to the face of the record and a stylus for playing that particular make. of re; cord is inserted in the lever arm. rect position for playing Athe two abovementioned types of recordsv is made positive b v the lug on the sound box stem, which cooperates with the two notches in the edge of the branch of the tone elbow, which re-v ceived the sound box stem. 1

Other /modifications of the form and arrangement of parts may be made iii view of the foregoing description-of the invention; and the invention is not restricted to the pre- The cori shown in the drawings.

I claim the following as my invention: 1. A sound box for a talk-ing machine comprising a diaphragm and a supporting fusing, a lever arm connected atone end to said diaphragm and supporting. a st-jf'lus at its other end7 the stylus end of the lever arm having a vibratory support corn-.rect i said supporting casing, and means mov; u mounted on the supporting casing said vibratory support whereby the an'iplin tildel of the vibrations of the saine maj.: be varied.

8. A sound box for a talking machine comprising a diaphragm and a supporting casing, a lever arm connectedat one end to said diaphragm and supporting astylus its other end, the stylus end of the leve-r arm having a lpivotal connection with ay vibratory support connected to said supporting casing, and an adjustable clamp slidably arranged on the supporting casing for securing' said vibratbry support to said casing interm mediate its ends.

4. A sound box for ay talking machine comprising a diaphragm and a supporting casing, aV lever arm connected at one end to said diaphragm and supporting a stylus at its other end, a vibratory support mounted on said sup' orting casing and arranged for' vertical adjustment thereon, the stylus end of the lever' arm being pivotall;7 connected to said support and an adjustable yoke slide adapted toengage the vibratorv supper.,

box for a.-talking machine comprising a diaphragm and a sujrrpurtmjlj whereby the amplitude of the Vibrations oi Y said lever arm can be controlled.

5. A sound box for a talking machine.` comprising a diaphragm and a, supportinfn p m casing a lever arm co1 `nected at one. end 7 i `the diaphragm of t-he'sound box and `supporting a. stylus at its other end.. a ieiri cally aldjustable support secured to the son box7 a. vibratory member` one enc. be justablv secured to the verticali?.v at support and the other free end beinl ed to pivotaillv support the lower i the st-vliis arm, and a clamp for securing the vibrator;T member to the. verticali;y adjustable support. said clamp being-arranged to slide valongr the adjustable support. wherein' the amplitude of the vibrations ofthe lever arm can be controlled.

G. A sound box for a talking machine Elu comprising a diaphragm and a supporting casing, a lever arm having one end connected to said diaphragm, a stylus connected to the lower end `oit said leverarm, a vertically adjustable support secured to the sound box having a horizontally disposed base portion, a fiat spring located beneath said base portion and having one,l end secured thereto means for adjusting said spring toward and away from the lever arm, the opposite free.

end of said spring being1 arranged to pivotally support the lower portion of the lever arm, and a clamp',y for securing the spring to the base portion of the vertically adjustable support, said clamp being arranged forV ,movement toward and away from the lever arm. n

7. A sound box for a talking machine comprising a diaphragm `and a supportingy cas` ing, a vibratory support connected to said supporting casing and arranged for bodily adjustment in both horizontal and vertical directions,l means Inova-bly mounted on the supporting casing' engaging' said vibratory support for varying `the amplitude 'of the vibrations oi" said vibratory support, and a stylus lever pivotally mounted'on said vibratory support and supporting a stylus on its lower arm, the upper arm of saidstylus lever terminating in a wire-like member of substantially uniform 'section coiled intoa helical spiral7 said helical spiralbelng connected to the diaphragm of the sound box. Signed at St. Louis, Missouri, this-18th day of August, 1917.

JAMES r. .sMirnt 

